Warp stop motion for looms



F b-24. 1925. w 1,527,195

' H. E. KHOURY WARP STOP MOTION FOR LOOMS Filed Dec. 11, 1922 4Sheets-Sheet l Feb. 24. 1925. 1,527,195

H, E. 'KHOURY WARP STOP MOTION FOR LOOMS Filed Dec. 11, 9 2 4SheetsSheet 2 A. 75 v Nwm H I" illllilllifi'l f. Khouav.

a itocmzq 5 Feb. 24, 1925-.

1,527,195 H. E. KHOURY WARP STOP MOTION FOR LOOMS Filed Dec. 11, 1922 4Sheets-Sheet 3 I advent Feb. 24, 1925.

H. E. KHOURY WARP STOP MOTION FOR LOOMS 1922 4 Sheets-Sheet 4 Filed Dec.11

v gwvomtoz Patented Feb. 24, 1925.

lhthltti HARRY KHOURY, OF NE'KV BEDFORD, BEASSAGHUSETTS.

WARP STOP MGTION FOR LOOMS.

Application filed December 11, 1922.

1 0 all whom it may concern:

Be it known that I, Harri-iv E. Knonnr, a citizen of Syria, residing atNew Bedford, in the county of Bristol and State of Massachusetts, haveinvented new and useful-Improvements in liar-p Stop Motions for Looms,of which the following is a specification.

This invention relates to warp stop motions for looms, and moreparticularly to the type wherein the harness heddles perform theadditional function of detector wires to stop the loom whenever one ofthe warp threads break.

An object of the invention is to provide a. stop motion which is simplein construction and hence readily applicable to a loom, and which, atthe same time, is positive and accurate in operation.

Stop motions of this general type are broadly old, and it is a wellknown expedient to employ the heddles for automatically stopping theloom. The present invention is an improvement upon existing stop motionsof this type. in accomplishing the objects of the invention there isprovided upon each heddle a loop through which passes a rocking barmounted in the heddle frame and adapted to be rockedas the frame isvertically reoiprocated in the loom operation. lhe bar is rocked as theheddle frame moves and preferably extends adjacent means adapted toeffect this movement. In the illustrated embodiment of the invention,the rocking means comprises. an arm movable by mechanism operated fromthe cam shaft of the loom, and in association with such arm is providedknock-off mechanism and means for actuating such mechanism. Theknock-oil mechanism comprises a finger which is movable relatively tothe remainder of the mechanism and is maintained out of engagement withthe actuating means as long asthe warp threads are unbroken. Vi heneverone of the threads breaks. the rocking bar is maintained against rockingmovement, which serves to prevent oscillation of the yoke arm andresults in the subsequent operation of'the knock-off mechanism by theaforementioned actuating means.

In the accompanying drawings there is Serial No. 666,194.

illustrated one form of a device embodying the invention, and in thesedrawings:

Fig. 1 is an end elevation of the loom with the lay removed in order tomore clearly disclose the stop motion structure.

Fig. 2 is a top plan view.

3 is a ,view on the line of Fig. 1 looking in the direction of thearrow.

Fig. i a partial end elevation showing a different relative position ofthe parts of the stop motion during its operation.

is a view similar to 4-, showing the relative position of the parts whenone of the warp threads breaks and the knoclco'fi. mechanism isactuated.

l 6 is a vertical section taken on the line 8-6 of Fig. 3.

F 7 a vertical section through the heddle frames showing the position ofa heddle when one of the threads breaks.

Fig. 8 is a detail view showing the spring tension means for the rockingbars, and

9 is a detail of the stop for limiting the rocking movement of one ofthe bars.

Referring to the drawings for a more detailed description, like numbersrepresenting; corresponding parts throughout the several views, 10indicates a portion of the loom frame in which is mounted the crankshaft 11 driven by a belt 12 adapted to be shifted between fast andloose pulleys 1? (Figs- 1 and on the crank shaft, and beneath the crankshaft is mounted a cam shaft 14 driven from the crank shaft by means ofgears 15, 16. The frame carries the usual shipper lever 17 extendingthrough a slotted guide plate 18 2) and normally pos tioned in a notch18 at one end thereof. The lever actuates a belt shiftinglever 19pivoted at 20 upon a. bracket 21. secured to the frame. Heddle frames22, in the present instance two in number, and which are of rectangularconstruction, as more clearly shown in Fig. 3, are vertically movable bymeans of lifter traps 23. the latter extend ing upwardly from the mesand secured to cams 24: upon a shaft which receives a rocking movementfrom driving mechanism (not shown). Springs 26 (Fig. 3) secured to thelower ends of the heddle frames. and suitably anchored to a. ii'xedmember on the loom frame, serve to tension the frames when they arelifted by the cams, and to draw the frames downwardly when the shaft isrocked. As much of the illustrated mechanism which has been described isordinary in loom construction, no further description is thoughtto benecessary since it does not constitute part of the present invention.The heddles, shown more clearly in Figs. 6 and 7, comprise central eyes28 through which the warp threads pass, top loop portions 29 and bottomloops 30. Substantially circular shafts 3]. pass through the bottom andtop loops, and the loops 29 also have extending therethrough anoncircular bar 32 mounted in each heddle frame and vertically movabletherewith. The bar 32 in each frame is adapted to have imparted theretoa rocking movement; one circular end extends through the :lrame and hasanchored thereto a coil spring 33 main tained in a housing 34 (Figs. 8and 9). The spring is fixedly secured to the frame 'by passing its end35 through an opening in the frame whereby rocking movement of the bartends to tension the spring, which serves to return the bar to normalposition. The housing 34 is maintained upon the end of the bar by meansof a set screw 36 and is cut away at one side to provide a slot oropening 37 therein, into which projects a stop finger 38 (Fig. 9)serving to hunt the rocking movement of the bearing and housing underthe actuation of the rocking means, the reverse actuation oi? the spring35) trame carries an extension 39 of non-circular cross sectionextending adjacent means adapted to rock the bars as the heddle 'l'ramesmove. In the present instance this means is shown in the form 0t yokes,each yoke having the two depending arms 40, 41 which are pivotallyconnected by a stud 42. The arm 41 of each yoke pivotally connected bymeans of a stud 45 to a reciprocable bar 46 having an extension portion47 (Fig. 1) adjustably connected thereto by means of a bolt 48 passing;through aligned slots in the two sections of the bar; and the arm 40 01each yoke has passing through its terminal portion rod 43 to which it issecured, as by set screw 44 (Fig. 3). One end 46' of bar 46 2) extendslaterally and has passing thcrethrough the rod 43 by which it issupported and guided in its reciprocable movements. The yokes are thussupported jointly by the rod 43 and the bar 46, the arm 41 of each yokebeing normally oscillated by the bar 46 which has a longitudinalreciprocable movement from operating; mechanism later to he described...The extensions 39 of the rocking bars together with the bars, movevertically with the heddle frames, the extensions travelling in theirrespective yokes. The arms of each The opposite end of each bar 32 inits yoke are provided, respectively, with shoulders 40, 41, and as thebar extensions 39 approach the shoulders. the oscillating movement ofthe arms 41, tends to rock the bars in a counter-cloclnvise direction,each extension being normally maintained in the slanted aosition shownin Figs. 4 and As the bar approaches the shoulder 40 it engages thelatter, and the subsequent approach of the arm 41 toward the arm 40completes the rocking oi the bar in opposition to its tensioning spring33 (Fig. 8).

.:.lie arms 41 and bar 46 to which they are connected are actuated inthe following manner To the extension 47 of the bar 46 is pivot allyconnected (Figs. 4 and 5) one arm (IE a bell crank lever 50 tulcrumed at51 upon a plate supported upon an arm 53 extending through a iiramebracket 54. The opposite end of the bell crank lever 50 is pivot allyconnected to a curved link 55 which slidably passes through a. block :36pi votally mounted upon a stud in the forked end 37 ot a continuouslymoving power operated lever 58. A. spring surrounds the link and servesto move the bell crank lever 50 when compressed by downward movement; oithe lever I pon upward movement ot the lever 53 it engages a stop nut6-6 thereon. which reversal moves the bell crank lever 510 and therebyreciprocatcs the bar 46 in the opposite direction. it will thus be notedthat the connection between the lever 58 and the rod 46 is a yieldingone by reason ot the interposition of the spring and link The lever 58is fulcrumed upon a stud 59 upon the bracket plate and is actuated by apitman 60 connected to the lever and at its lower end to a lever 61pivotally u'unmted upon a frame bracket 62 at one side of the ram shaft14. The lever (51 carries a cam block 63 engaging double cam 64 upon thecam shaftby means of which the levers 6i and 58 are actuated. Theprovision of a double-can'i 64 insures two upward move ments of thelever 61 and pitman 60 tor each rotation of the drive shaft 14. In otherwords, there is a downward or stopping movement of the lever tor eachpick.

lVhen no warp threads are broken. the bar 46 and the arms 41 areactuated. the morement of the arms serving to rock the bars 32 when theextensions 39 thereof approach the lower portion of the yoke. When oneof the warp threads breaks. the huddle. which is normally supported bythe warp threads, drops to the position shown in Fig. 7, and the narrowportion 29' at the upper end ot the heddle loop 29 interlocks with thebar 3., and, as the latter moves downwardly. prevents the bar fromrocking. ,is a coii sequence the bar extension 39 passes below theshoulders 40, 41' of the yoke arms in its original slanted position, asindicated in Fig. 5 locked against rocking movement. lVhen either bar islocked the extension 39 of the bar prevents the yoke arm ll from movingtoward arn'i 40 as indicated in F 5, and, through mechanism now to bedescribed, causes operation of the loom knockofi mechanism.

The extension 47 of the bar 4C6 has pivotally connected thereto a finger69 by means of a stud 70. Adjacent its upper end the finger is pivotallyconnected at 71 to an arm 72 of a lever 73 pivoted at its upper end 7%to the bracket plate The lower end of the lever 73 is pivotally securedby means of a. loop 75 to the end of rod 43 which is longitudinallymovable in a. bearing bracket 76' (Fig. 2) and has an end hook portionl3 adapted to engage the shipper lever and throw the latter out ofrecess 1.8 in guide nlate 1S 2). During reciprocation ot the bar 46 andits extension 4-7 the finger 69 is moved about its pivot 71 withoutmoving the lever 73 or the rod The finger 69, together with the lever 73and rod 4.3, are a portion of the knock-ofi mechanism ot the loom whichis power operated from cam 64 through pitman 60 and lever 58, and thefinger 69, during the ordinary operation of the loom, when no warpthreads are broken, is moved relatively to the remainder of themechanism in the manner just described. This pivotal movement maintainsthe upper end 69 of the finger 69 out of engagen'ient with a latch orlug 78 fixedly secured to the lever 58, and as the lug is moveddownwardly during the operation of lever 58, it clears the tip of thefinger, and moves across the inclined face 69 of the finger, asindicated in Fig. 1, the clearance between the latch 78 and the tip ofthe finger 69 being due to the movement of the finger top to the leftfrom the position indicated in Fig. 4;. In other words, the knock-oilmechanism is power operated. and the movements of the fingers 69 and lug78 of he mechanism are so timed that upon downward movementof the lugthe finger is given a counter-clockwise movement through bar iii andhell crank about its pivot 71 from the position shown in Fig. 4: to thatshown in Fig. i. The finger is in the position shown in Fig. at when thelug 78 is about to make its downward stroke, during the course of whichmovement the lever moves the arms 4-1 of the yokes and the bar 46 to theright, as viewed in Fig. L. In order to maintain this "idearance betweenthe finger 69 and latch 78 the XtGHSlOll 47 of the bar 46 may beadjusted relatively to the bar, this adustment serving to increase ordecrease the amplitude oi movement of the finger, de pending upon thedirection the extension is moved relative to the bar. Should one of thethreads break, this results in the dropping of its heddle and theengagement of the narrow passage 29 of the heddle loop 29 with the bar32 which engagement continues as the heddle frame descends. The bar 32is thereby locked against rockingmovement as its extension 39 descend-sto the lower portion of the yoke. lVhen the extension 39 passes belowthe shoulders 4C0, 41 of the yoke without turning, as shown in Fig. 5,the arm ll is held against movement to the right. as viewed in Fig Asthe lug 78 upon the lever 58 descends, it engages the tip of fingers 69(Fig: thereby throwing the lever 73 to the right and actuating rod -l3to which the lever is connected. The hooked end 13 of the rod engagesthe shipper lever 17, and thro vs the same out of the recess 18, therebypermitting the spring 17 (Fig. l) to actuate the lever and to shift thebolt through the belt shitting lever 19.

Spring 43 upon rod 43 is placed under tension as the rod is moved to theright, due to the fact that it abuts the bracket 76 and serves to returnthe rod and lever 74: to normal position after the shipper lever beenthrown, the stop collar slat limiting the movement of the rod under theactuation of the spring.

It will be understood that the cam 6% is c nstantly actuating the lever58 and pit man 6%) and effects two upward or stopping movements of thepitiuan for each rotation of the drive shaft 1-4;. In other words, thereis an operating or stopping movement downward of that portion of thelever 58 hearing the latch or lug 78 for each pick which will result inthe stopping of the loom should a warp thread break before another pickoccurs subsequent to the breakage.

it will be understood that numerous details of the illustrated anddescribed structure may be modified materially without departing fromthe scope of the invention, the latter being more definitely defined inthe following claims.

I claim:

l. In a warp stop motion for looms, the combination with theheddle-fra-me and heddles, oi. a loop connected to each heddle, arocking bar mounted in the frame and pass ing through the loops, meanson the loops for preventing rocking oi the bar when any one of thethreads breaks, ayoke comp-rising a pair oi pivotally ronnected arms,said bar passing between the yoke arms and being vertically movable withsaid frame, means for swinging one oi said arms. a knock-oil mcchantm.and means connected to one oi said movable yoke arms for opersaidknock-oi? mechanism, said arm being engageable by said bar, when thelatter is held ,ainst rocking movement. to cause of said knock-oiloperating mechi. .lu a. warp stop motion for looms, the combination withthe heddle frame and bed dles, of a loop connected to each heddle, arocking bar mounted in the frame and movable therewith, said bar passingthrough the loops, means on the loops for preventing rocking of the barwhen any one 01 the threads breaks, a yoke formed of a pair of pivotallyconnected arms between which said bar passes, yielding means for movingone of said arms, said bar being adapted to ongage said arm and toprevent pivotal movement of the arm when rocking move mentof the bar isstopped, a knock-oil mechanism, and means for operating said mechanism,said means being rendered operative only when movement of said yoke armis prevented by said bar.

3. In a warp stop motion for looms, the combination with the heddleframe and hedlles, ot' a loop on each heddle, a rooting bar rnounted inthe frame and passing through the loops, means for ireventing rocking otthe bar when any one of the threads breaks, a movable member on the loomadjacent which said bar extends, means for continuously moving saidmember, said bar being adapted to hold, the member against movement whenone of the threads breaks and rocking ot the bar is prevented. aknoclnotl mechanism, and means for actuating said knockoff mechanism,said means being operative only when said member is held againstmovement by said bar.

a. In a warp stop motion for looms, the ombination with the heddle frameand hedzlles, ot a rocking bar associated with the heddles and mountedin th heddle frame, means for holding the bar against rocking movementwhen one of the warp threads breaks, a continuously movingarm mounted onsaid loom, means on said bar adapted to engage the arm when the bar isheld against rocking movement, and to prevent movement of the arm,yielding means for actuating said arm, a knocleoi'l mechanism, and means.tor operating said n'iechanism, said means comprising a lingerpivotally movable through connections with said arm, a lino k-otl baroperatively connected to said (roger, and member on said arm moving",-means adapted to engage and to actuate said t. o'er to throw said oaronly when pivotal movement of said finger is stopped.

E. In a warp stop motion for looms, the ciniibination with the heddletrame and heddles, o? a bar associated with the heddles and movablymounted in the heddle frame, the heddles being torn'iec to permit thebar to pass therethrough and being adapted to lock the bar 7 he warpthreads brealvts, means adapted to move the bar in one d rection as theheddle trame moves, power operated mechanism 'ior continuously movingsaid bar moving hie-ins, the bar being adapted to restrain said meansagainst movement when one of the warp against movement when one ofthreads breaks, knock-off mechanism, power opera-ted means for actuatingsaid knock-oft mechanism, and connections between said bar moving meansand the knock-off mech anism whereby the latter is operative only whenthe bar moving means is restrained against movement by the locking 01the bar.

6. In a warp stop motion for looms, the combination with the heddleframe and. beddles, of. a rockable bar associated with the heddles andmounted in the heddle frame, means on the heddles for holding the baragainst rocking movement when one of the warp threads breaks, a movablearm mounted on said loom and adapted to rock said bar, yielding meansfor moving said arm, said bar being adapted to lock said arm againstmovement when one of the n '1) threads breaks, knock-oil mechanism, andmeans "for actuating said knock-off mechanism, s: id means beingoperatively only when said arm is held aoainst movement and comprising apivoted ringer, a continuously opcrating lever. and a latch on saidlever for v. ,7 k the finger, the linger being main tained out oi;engagement with the latch by the movement of said arm.

7. In a warp stop motion for looms, the combination with the heddleframe and lied dies, of a rockalble bar associated with the heddles andmounted in the heddle frame, means on the heddles adapted to engag geand to hold the bar against rocking movement when one of the warpthreads breaks, a movable member engaging said bar and rocking the same,yielding means for moving said member, said bar being adapted to preventmovement of said member when the bar is held against rocking movement,l-tnoclcotf mechanism comprising a finger pivotally movable by the meanswhich move said member, and power operated means for engaging saidfinger to actuate said n'ieclninism, said finger being normallymaintained out of contact with said means by the movement oi saidmember.

8. In a warp stop motion for looms, the combination with the heddleframe and lied dies, of a rockable bar associated with the heddles andvertically movable with the heddle frame, means on the lieddles adaptedto engage and to hold the bar against rocking movement when one of thewarp threads breaks, a yoke having a pair of arms one of which has anoscillatory movement, said bar extending between the arms and saidmovable arm serving to rock the bar, yielding means for actuating saidyoke arm, said bar serving to prevent movement of the arm when the baris locked against rocking, knock-oft mechanism and means for actuatingsaid mechanism, said means being rendered operative only when the yokearm is held against movement by said bar.

9. In a warp stop motion for looms, the

lill) combination with the heddle frame and heddles, of a rockaole barassociated with the heddles and mounted in the heddle frame, means onthe heddles adapted to engage and hold the bar inst rocking movementwhen one of the tarp threads breaks,

yielding means for maintaining the bar against rocking movement, a yokemounted upon the loom and having a pair of depending arms one of whichis pivotally movable relative to the other arm, said bar extendingbetween said arms, means for oscillating said movable arm, said armserving to rock the bar, the latter being movable longitudinally of saidyoke, and said bar serving to prevent movement of the arm when the baris held against rocking movement by one of the heddles, yielding meansfor oscillating said arm, knock-off mechanism comprising a fingerpivotally movable relative to the remainder of the mechanism throughconnections with said arm, and means for ac- Euating salid linger, saidmeans engaging the ringer only when the yoke arm is locked againstoscillatory movement.

10. In a warp stop motion tor looms, the combination with the heddleframe and heddles, of a rockable bar associated with the heddles andvertically n ovable with the heddle frame, means on the heddles adaptedto engage and to hold the bar against rocking movement when one ot thewarp threads breaks. spring means for normally maintaining the baragainst rocking movement, a yoke having a pair of depending arms andmounted upon a stationary portion of the loom, said bar extendingbetween the arms of the yoke and vertically movable relative to theyoke, means for moving one of the arms of said yoke, said movable armserving to rock said bar and the bar being adapted to hold the armagainst movement when the bar is locked against rocking movement,yielding means for moving said yoke arm comprising a reciprocatory rodand a lever for actuating said rod, knock-elf mechanism comprising afinger pivotally movable by said reciprooatory rod relative to theremainder of the mechanism, and knock-off actuating mechanism adapted toengage the linger, said actuating mechanism engaging the finger onlywhen movement of the yoke arm is stopped.

11. In a warp stop motion for looms, the combination with a heddleframe, a series of heddles adapted to be supported in said. frame by thewarp threads, of a rockahle bar movably mounted in the heddle frame,

the heddles being formed to permit the bar to extend therethrough andbeing adapted to engage and lock the bar against movement when one ofthe warp threads breaks, means on the loom separate from the bar adaptedto rock the bar as the heddle frame moves, and power actuated means tostop the loom, said step means being maintained inoperative long as thebar is free to move under the influence of said actuating means.

12. In a warp stop motion for looms the combination with a heddle frame,heddles supported therein by the warp threads, of a bar movably mountedin the heddle frame, the. heddles being formed to permit the bar toextend theret rough and being adapted to lock the bar a st movement whenone of w p thre oaks, means on the loom frame and separate from the layadapted to move said bar in one direction as the heddle frame moves, andpower actuated means actuatable independently of said bar to stop theloom, said stop means being maintained inoperative through said barmoving means as long as the bar is unlocked and free to be movedthereby.

13. In a warp stop motion for looms, the combination with a heddleframe, heddles supported therein by the warp threads, of a rockable barmovably mounted in the hed dle frame, the heddles being formed to permitthe bar to extend. therethrough and bein adapted to lock the bar againstmovement when one of the warp threads breaks, means on the loom adaptedto rock said bar in one dir ction as the heddle frame moves, springmeans for rocking the bar in the opposite direction, and power actuatedmeans to stop the loom, said step means being maintained inoperativethrough said bar moving means as long as the bar is unlocked and free tobe moved thereby.

14, in a warp stop motion. for looms, the combination with a heddleframe, heddles supported therein by the warp threads, of a rockable barmovably mounted in the heddle frame, the heddle s being formed withloops through which said bar extends and being adapted to lock the bar aainst movement when one of the warp threads breaks, means separate fromthe bar on the loom adapted to be engaged by and to rock said bar in onedirection as the heddle frame moves, and power actuated means to stopthe loom, said step means separate from the lay being maintainerinoperative through said bar moving means as long as the bar isunlocked. and free to he moved thereby.

15. In a warp stop motion for looms, the -z'ombinatiou witl a heddleframe, heddles supported therein by th warp threads, of a bar movablymounted in the heddle frame, the heddles being formed with loops throughwhich said bar extends and being adapted to lock the bar againstmovement when one of the warp threads breaks, means on the loom adaptedto be engaged by and to move said bar in one direction as the heddleframe moves, spring means for moving the bar in the opposite direction,and power actuated. means separate from the lay any one of the threadsbreaks, a movable arm on the loom, means separate from the lay formoving said arm, said bar being movable by said arm in one direction,spring means for moving the bar in the opposite direction, a knock-oilmechanism, connections between said knock-off mechanism. and said arm,said knock-off mechanism. being normally maintained inoperative throughsaid connections but permitting operating when the bar is heldagainst,movement.

24. In a warp stop motion for looms, the combination with a heddle frameand heddles, of a rocking bar mounted in the frame and movabletherewith, each heddle being provided with a loop through which said barpasses, means on the heddles for preventing rocking of the bar when anyone of the threads breaks, a movable arm on the loom frame adjacentwhich the bar extends, power operated yielding means for moving saidarm, said arm when moved in onedirection routing the bar, said bar beingadapted to prevent movement of the arm when rocking movement of the baris stopped, a knock-off mechanism. power means for operating saidmechanism, aid means being rendered operative only when movement of saidarm is prevented by the locking of the bar.

25. In a warp stop motion for looms. th combination with the heddleframe an heddles, of a rocking bar mounted in th frame and movabletherewith, each hedrl being provided with a loop through which said barpasses, means on the heddles for preventing rocking of the bar when anyone of the threads breaks, a mo able arm on the loom frame adjacentwhich the bar et-: tends, power operated yielding means for moving saidarm, said arm when moved in one direction rocking the bar, spring meansfor rocking the bar in the opposite direction, said bar being adapted toprevent movement of the arm when rocking movement of the bar is stopped,a knocle otf mechanism, power operated means for operating saidmechanism, said means being rendered operative only when movement ofsaid arm is prevented by the bar.

26. In a warp stop motion for looms, the combination with a heddle frameand heddles, of a rocking bar mounted in the frame and movabletherewith, each heddle being provided with a loop through which said barpasses, means on the heddles for preventing rocking of the bar when anyone of the threads breaks, a movable arm on the loom frame adjacentwhich the bar extends, power operated yielding means for moving saidarm, said arm when moved in one direction rocking the bar, spring meansfor rocking the bar in the opposite direction, said bar being adapted toengage said arm and to prevent pivotal movement of the arm when rockingmovement of the bar is stopped, a knock-off mechanism, power means foroperating said mechanism, said means being rendered operative only whenmovement of said arm is prevented by the bar.

27. in a warp stop motion for looms, the combination with the heddleframe and heddies, of a loop on each heddle, a bar movably mounted inthe frame and passing through the loops, means on the heddles forpreventing movement of the bar when any one of the threads breaks, anarm on the loom, means on said barextending adjacent said arm. poweroperated means separate from the lay for moving the arm. said bar beingadapted to hold the arm against movement when any one of the threadsbreaks and the movement of the bar is prevented, a knockoff mechanismand power operated means for actuating said knock-off mechanism, saidmeans being operative only when the arm is held against movement by saidbar.

in a warp stop motion for looms, the combination with the warp threads,of detector wires supported thereby, a movable bar QTii'GEltlllljfthrough the detector wires and adapted to be locked thereby when one thewarp threads breaks. a continuously 'iug rm on the loom operativelyassociwith said bar and adapted to more the same, means on the baradapted to en fir the arm when the bar is held against movement andthereby to prevent movement of the arm, yielding means for actu at ingthe arm, a knock-oft mechanism, power actuated means for()lFQl'tll'lllQ: said mechin uisau, said means comprising a movablefinger, comiections between said arm and the finger through which thefinger is moved, a knock-cit bar connected to said finger, and acontinuously moving member adapted to engage and to actuate said. fingerto throw said bar only when movement of the finger through saidconnections is stopped.

29. In a warp stop motion for looms, the combination with a heddleframe, of a series of heddles adapted to be supported in said frame bythe warp threads, a bar rockably mounted in the heddle frame, theheddles being formed to permit the bar to extend theretln'ough and beingadapted to engage and lock the bar against rocking movement when one ofthe warp threads breaks, means on the loom separate from the bar adaptedto move the bar as the heddle frame moves, and power actuated means tostop the loom, said stop means being maintained inoperative as long asthe bar is free to move under the influence of said moving means.

30. In a warp stop motion for looms, the combination with a heddleframe, of a series of heddles adapted to be supported in said frame bythe warp threads, a. bar rockably Ind mounted in the heddle frame, theheddles being formed to permit the bar to extend therethrough and beingadapted to engage and lock the bar against rocking movement when one ofthe warp threads breaks, means on the loom separate from the bar adaptedto move the bar as the heddle frame moves, and power actuated meansactuatable inclependently ot the movement of the heddle frame to stopthe loom, said stop means being maintained inoperative as long-as thebar is tree to move under the influence of said moving means.

31. In a warp stop motion for looms, the combination with a heddleframe, a series of heddles adapted to be supported in said frame by thewarp threads, of a rockable bar movably mounted in the h-eddle frame,the heddles being termed to permit the bar to extend therethrough andbeing adapted to engage and lock the bar against movement when one ofthe warp threads breaks, means on the loom separate from the bar adaptedto rock the bar as the heddle frame moves, and power actuated means tostop the loom, said stop means being; maintained inoperative as long asthe bar is free to move under the influence of said actuating means, andincluding a continuously moving member, and means driven from the loomdrive shaft for imparting a movement to said member before every pick,any one of said movements being adapted to ettect stoppage otthe loomwhen said bar is locked.

32. In a warp stop motion for looms, the combination with a heddleframe, heddles supported therein by the warp threads, of a rockable barmovably mounted in the heddle frame, the heddles being formed with loopsthrough which said barextends and being adapted to lock the bar againstmovement when one of the warp threads breaks, means separate from thebar on the loom adapted to be engaged by and to rock said ban in onedirection as the heddle frame moves, and power actuated means to stopthe loom, said stop means being maintained inoperative through said barmoving" means as long the bar is unlocked and tree to v be moved therebyand including a eontinuonsly moving member, and a cam driven from theloom drive shatt for imparting movement to said member before everypick, any one of said movements being adapted to ettect stoppage ot theloom when said bar is locked.

33. In a warp stop motion for looms, the combination with a heddle frameand heddles supported therein hy the warp threads, at a bar movablymounted in the heddle frame, the heddles being formed to permit the barto extend tl'ierethrough and being; adapted to engage and lock said baragainst movement when one of the warp threads tweaks means on the loomadapted to move the bar as the heddle :trame moves, and power operatedmeans to stop the loom, said stop means being maintained inoperativeonly as long; as the bar is tree to be moved by and bar roving; means,and including a continuously moving member, and a cam adapted to impartthereto a movement before every pick, any one of said movements beingadapted to ettect stoppage of the loom when said bar is locked.

In testimony whereof I have hereunto set my hand.

HARRY E. KI-IOURY.

